Ceramic Grinding Mill Automated Unloading System
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Solution Overview
Problem
Existing discontinuous grinding mills in the ceramic sector face inefficiencies and high operational costs due to laborious and difficult manual unloading processes, which are not easily automatable, leading to increased downtimes and specialized personnel requirements.
Innovation Solution
A horizontal-axis cylindrical grinding mill with an automated unloading system, featuring a butterfly valve with a filter that remains stably fixed and only removable for inspections, allowing for pneumatic actuation to facilitate automatic and efficient discharge of the slip without rotating the drum in the opposite direction, thus eliminating the need for complex structures and manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a discharge valve with mesh filter is used at the unloading mouth, then the slip can be discharged while retaining grinding bodies, but the valve must be removed before each grinding cycle to prevent damage from grinding bodies contact
Solution Approach 1:
The filter mesh is extracted from the discharge valve assembly and positioned inside the drum at the unloading mouth, where it remains protected from grinding body contact while still performing its filtration function during slip discharge.
Solution Approach 2:
The filter mesh is pre-installed in a protected position inside the drum before grinding operations begin, eliminating the need for repeated installation and removal of the valve assembly.
2Ease of operation
If the drum is rotated to position the unloading mouth for opening and closing operations, then the valve can be accessed and operated, but this causes increased downtime and operational complexity
Solution Approach 1:
The system is designed so that the discharge operation occurs automatically when the unloading mouth is in its operational position, without requiring manual intervention or additional drum rotation for valve operation.
3Device complexity
If the unloading valve with mesh filter remains fixed at the unloading mouth, then the structure is simpler and automation is easier, but the mesh would be damaged by contact with grinding bodies during rotation
Solution Approach 1:
The filter mesh is extracted from the discharge valve assembly and positioned inside the drum at the unloading mouth, where it remains protected from grinding body contact while still performing its filtration function during slip discharge.
Solution Approach 2:
The unloading mouth structure serves as an intermediary that allows the filter mesh to be positioned in a location where it can perform its function without direct exposure to grinding bodies, mediating between the need for filtration and the need for protection.
4Reliability
If multiple operations (drum rotation, valve mounting/dismounting, filter replacement) are required for unloading, then the system can protect the filter, but automation becomes difficult and specialized personnel are required
Solution Approach 1:
The filter mesh is extracted from the discharge valve assembly and positioned inside the drum at the unloading mouth, where it remains protected from grinding body contact while still performing its filtration function during slip discharge.
Solution Approach 2:
The unloading mouth structure serves multiple functions: it acts as the discharge opening, provides structural support for the filter mesh, and positions the filter in a protected location, eliminating the need for separate valve assembly and disassembly operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables automatic, efficient, and cost-effective unloading of materials, reducing downtime and operational costs, while simplifying maintenance and eliminating the need for complex structures, thereby enhancing the mill's reliability and ease of operation.
Implementation Method 1
The drum consequently comprises a single hatch for inspection. In particular, the discharge tube is provided with a first end associated to the outlet mouth and a second end open to the outside, and winds around the outer shell in a same direction as the operating rotation direction of the cylindrical drum.
Data Source
Figure 1~2
Figure 3~4
AI summary
A grinding mill (1) has a horizontal-axis cylindrical drum (2) which rotates about the horizontal axis in order to perform a grinding with aid of grinding bodies, the cylindrical drum (2) being provided with an outer shell (3) closed by an entry-end base plate (4) and a bottom-end base plate (5), and by means for evacuating the cylindrical drum (2) which comprise at least an outlet mouth (14) afforded in the outer shell (3). A valve (44) is associated to the outlet mouth (14), which valve (44) is provided with a filter (50) for the grinding bodies, the drum (2) further providing a supply inlet of material to be ground which is coaxial with the horizontal rotation axis of the drum (2).